It's Amy Rose's birthday, and she's hosting a murder mystery party on the Mirage Express! When Sonic the Hedgehog becomes the game's victim, everyone is off to get to the bottom of things. However, something feels a bit off - is this really an innocent game or is something more sinister afoot? Join the colorful cast of the Sonic the Hedgehog series in an exciting new adventure! Interrogate some of your favorite characters as you figure out what happened to Sonic. Play as a new character who is starting their first day working on the Mirage Express and meet the kind Conductor who is finally retiring from his long run with the train! Immerse yourself in the sights and sounds of the Mirage Express, featuring fully hand-drawn landscapes and characters.